Spark-arrester



(No ModeL) H. MILLHOLLAND.

SPARK ARRBSTER. I No. 271,255. Ratented Jan.30,1883.

Fig .1

WITNESSES: INVENTOR m I W v I! 6 f m I. I

N. PLTERS. PhoXo-Lfihogmphon WaihInglon. DIO

1 UNITED STATES.

PATENT Denice.

HENRY MlLLHOLLAND, OF PHILADELPHIA, PENNSYLVANIA. Q

SPARK-ARRESTER.

SPECIFICATION forming part of Letters Patent No. 271,255, dated January 30, 1883.

Application filed November 517, 1882. (No model.) i

To all whom it may concern:

Be it known that I, HENRY MILLHOLLAND, of the city and county of Philadelphia, in the State of Pennsylvania, have invented certain new and useful'lmprovements in Spark-Arresters for Locomotive-Engines, of which the following is a specification.

My invention relates to that large class of devices which are known as spark-arresters, and its object is the efi'ectual retention of cinders and economy in the consumption of fuel;

In the accompanying drawings, Figure l represents in longitudinal vertical central sectional elevation an apparatus conveniently em bodying myinvention, and shown applied toa locomotive-engine, a portion only of which latter is represented. Fig. 2 is a transverse vertical sectional elevation of the same, taken on the dotted line a; a; of Fig. 1-.

Similar letters of reference indicate corresponding parts.

In the accompanying drawings, A represents the extreme front portion of a locomotiveboiler, and a the fines therein, which communicate in' the usual manner with the smoke-box B.

G is the Smokestack, and D an exhaust-pipe leading from the steanrcylinders, the discharging extremity or nozzle cl of which is centrally below the stack.

E is a solid diaphra gm, extending in a horizontal plane across the smoke'box to a line slightly in advance of the exhaust-pipe, which passes through it, beyond which line it is in effect continued in the form of a horizontal screen or netting, H. The diaphragm and screen together divide the smoke-box horizontally into an upper and a lower compartment, which I have respectively designated by tremity of the exhaust-pipe, so as to receive the steam therefrom and discharge it centrally within the stack. It is suspended from the base of the stack or upper portion of the smokebox by vertical adjusting-screws I or kindred devices, whereby its vertical set may be controlled and the proper relation between it and the orifice of the exhaust-pipe be established. If desired, it may be erected from the hori zontal diaphragm instead of being suspended.

J represents an accumulation of cinders or sparks in that portion of the-lower compart ment of the smoke-box forward of the inclined partition which I have entitled the cinderchamber and have designated by the letter K.

The above being a convenient embodiment of a preferred form of my invention, the operation of the device will be easily understood. The exhaust-steam escaping through and from the. exhaust-pipe into the blast-concentrator occasions the formation of an ejecting-current. The blast-concentrator and exhaust-pipe together acting as an ejector create a vacuum in the immediate neighborhood of said blastconcentrator, into which and into the ejecting influence of the blast the smoke and gases are consequently drawn, in the manner and direction indicated by the arrows in the drawings. The cinders sucked through the flues (t are deflected by the inclined partition against the screen, and are intercepted by the latter and gravitate into the cinder-chamber of the lower compartment of the smoke-box, where they are represented in the drawings as collected.

It will be readily understood that the steanr blast generated in the injector creates an artificial current, whereby the full opening of.

the exhaust-pipe is enabled to be maintained, back-pressure in the cylinder avoided, and a consequent saving of fuel effected. The cinders, moreover, when they have gravitated into the cinder-chamber are protected by the inclined partition from the current from the lines, which, were they subjected to it, would agitate and churn them constantly until by abrasion they would be rendered sufficiently small to pass through the mesh of the screen.

Having thus described my invention,l claim and desire to secure by Letters Patent-- 1. As an improvementin locomotiveengines, the combination, with a smoke-box with which the boiler-fines communicate, of a diaphragm and netting which together divide the box into two compartments, an exhaust-steam pipe, a blast concentrator operating in connection therewith, and an inclined partition, the whole constructed, arranged, and operating substantially as hereinbefore set forth.

2. The combination, with a smoke-box of a locomotive-engine, which is divided into two compartments by means of a solid horizontal diaphragm and a screen, being a continuation of the same, substantially as set forth, of an inclined partition, substantially as and for the purpose specified.

3. As an improvementin locomotive-engines, 

